165873970 has 8 divisors (see below), whose sum is σ = 298573164. Its totient is φ = 66349584.

The previous prime is 165873949. The next prime is 165873979. The reversal of 165873970 is 79378561.

It can be written as a sum of positive squares in 2 ways, for example, as 165868641 + 5329 = 12879^2 + 73^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 165873970.

It is not an unprimeable number, because it can be changed into a prime (165873979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8293689 + ... + 8293708.

Almost surely, 2^165873970 is an apocalyptic number.

165873970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165873970 is a deficient number, since it is larger than the sum of its proper divisors (132699194).

165873970 is a wasteful number, since it uses less digits than its factorization.

165873970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16587404.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 165873970 is about 12879.2068855190. The cubic root of 165873970 is about 549.4473456910.

The spelling of 165873970 in words is "one hundred sixty-five million, eight hundred seventy-three thousand, nine hundred seventy".